Double-cavity air spring structure

Abstract

The utility model discloses a double-cavity air spring structure which comprises an upper top seat and a lower base, the upper top seat comprises an upper cover and a lower cover, the upper cover is arranged at the upper end of the lower cover, an electromagnetic valve is arranged between the upper cover and the lower cover, a piston is sleeved outside the lower cover, a bag skin is connected between the lower cover and the lower base, a protective cylinder is arranged outside the bag skin, and a bearing seat is arranged at the top of the upper cover. By adopting the double-cavity air spring structure disclosed by the utility model, the rigidity of the air spring can be adjusted, and the torsion failure of the bag skin is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of air springs, and specifically relates to a double-cavity air spring structure. Background Art

[0002] At present, air springs are widely used in the field of vehicle shock absorption. Air springs are divided into single-chamber and multi-chamber. The stiffness of single-chamber air springs cannot be adjusted. It is close to static stiffness at low frequencies and dynamic stiffness at high frequencies. However, cars need to change different driving modes during driving, and different driving modes require different air spring stiffness. Obviously, single-chamber air springs cannot meet the requirements of various driving conditions and comfort. Although the stiffness of multi-chamber air springs can be adjusted, their structure is complex, the assembly process is difficult, and the application cost is high.

[0003] Due to the overall vehicle layout, air springs are divided into integrated or split structures of shock absorber and air spring. When the shock absorber and air spring are split structures, the air spring needs to withstand a certain torsion angle, so the air spring skin is prone to torsional failure, causing the air spring to not work properly.

[0004] The invention patent with announcement number CN105673759A disclosed on June 15, 2016, an air spring with independent adjustment of suspension height and stiffness and its control method; the air spring includes a double-chamber air spring, an air supply and pressure regulating device and an air spring controller; the double-chamber air spring is mounted on the original vehicle shock absorber and connected to the air supply and pressure regulating device through an air pressure hose; the air spring controller is fixedly installed in the trunk of the vehicle and connected to the signal end of each sensor and actuator in the air supply and pressure regulating device through a bus. The air spring cannot solve the problem of bladder skin torsion failure. Utility Model Content

[0005] The utility model aims to provide a double-cavity air spring structure capable of adjusting the stiffness of the air spring and avoiding torsion failure of the bladder skin in view of the deficiencies in the prior art.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] The double-chamber air spring structure includes an upper top seat and a lower base, the upper top seat includes an upper cover and a lower cover, the upper cover is arranged on the upper end of the lower cover, a solenoid valve is arranged between the upper cover and the lower cover, a piston is sleeved on the outside of the lower cover, a bladder skin is connected between the lower cover and the lower base, a protective tube is arranged on the outside of the bladder skin, a bearing seat is arranged on the top of the upper cover, and a bearing is arranged between the upper cover and the bearing seat.

[0008] The bearing is a step structure, the upper end of the bearing is arranged on the inner side of the bearing seat, the lower end of the bearing is arranged on the inner side of the upper cover, the upper end of the bearing is clearance-matched with the bearing seat, and the lower end of the bearing is clearance-matched with the upper cover.

[0009] The inner side of the bag skin, the bottom end of the lower cover and the upper end of the lower base constitute a first chamber, the outer side of the bottom of the upper cover, the inner side of the lower cover and the outer side of the solenoid valve constitute a second chamber, a connecting port is provided in the middle of the bottom end of the lower cover, and the solenoid valve is located above the connecting port; a first gas channel is provided at the bottom of the upper cover, and a second gas channel is provided on the inner side of the lower cover, the first gas channel and the second gas channel are connected, and the bottom of the second gas channel is connected to the first chamber.

[0010] The bottom end of the upper cover is evenly distributed with first grooves, the top end of the lower cover is evenly distributed with second grooves, the first grooves are matched with the second grooves, the first grooves and the second grooves are connected to form a combined chamber, the side of the combined chamber is provided with an opening, and the opening is connected to the second chamber.

[0011] The bottom of the upper cover extends into the lower cover, the top of the solenoid valve extends into the upper cover, the inner side of the bottom end of the lower cover is provided with a mounting step, and the bottom end of the solenoid valve is installed on the mounting step; a first sealing ring is provided between the upper cover and the side of the solenoid valve, a second sealing ring is provided between the mounting step and the bottom of the solenoid valve, a gasket is provided in the upper cover at the top of the solenoid valve, and a retaining ring is provided above the gasket.

[0012] The two sides of the top of the bladder skin are respectively fitted with the casing and the piston, the upper end of the lower base is provided with a gasket, the outer side of the gasket ring is an inclined structure, and the other end of the bladder skin is fitted with the outer side of the gasket ring; the first tooth pattern section is provided on the outside of the bottom end of the lower cover, and the second tooth pattern section is provided on the outside of the upper end of the lower base, the two ends of the bladder skin are respectively in contact with the first tooth pattern section and the second tooth pattern section, and the first buckle ring and the second buckle ring are respectively provided on the two ends of the bladder skin, the first buckle ring presses the top end of the bladder skin, and the second buckle ring presses the bottom end of the bladder skin.

[0013] A support ring is arranged inside the bladder skin, a corrugated protrusion is arranged on the casing, corrugated depressions are arranged at the upper and lower ends of the corrugated protrusion, the support ring is at the same height as the corrugated protrusion, and the support ring is located between the corrugated depressions.

[0014] A first dust cover is connected to the end of the upper cover and the top of the protective tube, a first clamp is provided on the outside of the top of the first dust cover, a dust cover gasket is provided between the bottom end of the first dust cover and the protective tube, a second clamp is provided on the outside of the bottom end of the first dust cover, the first clamp and the second clamp respectively press the two ends of the first dust cover; a second dust cover is provided between the protective tube and the lower base, and the two ends of the second dust cover are respectively clamped with the bottom end of the protective tube and the end of the lower base.

[0015] A protrusion is arranged on the outside of the upper cover, and a claw is arranged at the bottom end of the bearing seat. The claw is arranged at equal intervals along the circumferential direction, and the claw cooperates with the protrusion.

[0016] The top end of the solenoid valve is connected with a wiring harness assembly, which extends from an upper top seat and is provided with a dust plug.

[0017] The technical effects of the utility model are as follows: the double-chamber air spring structure of the utility model is adopted to divide the inner cavity of the air spring into two chambers, and the connection and disconnection between the first chamber and the second chamber are realized by controlling the opening and closing of the solenoid valve, so that the stiffness of the air spring can be adjusted, and the problem that the stiffness of the single-chamber air spring cannot be adjusted is solved. A combined chamber connected to the second chamber is also designed at the connection between the upper cover and the lower cover, ensuring that the second chamber can reach the required design theoretical volume, which can adapt to different driving modes of the car and improve the comfort of passengers; a bearing structure is added to the upper top seat, and the torsion generated during the working process of the air spring is borne by the bearing, which solves the problem of torsion failure of the air spring bladder skin when the shock absorber and the air spring are split structures. The structural design of the double-chamber air spring structure is reasonable, the connection between the components is reliable, the air spring components are stably and firmly installed, the assembly is convenient, the assembly process is simple, the structure is compact, and the application cost can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] This specification includes the following drawings, which show the following contents:

[0019] Figure 1 It is a cross-sectional schematic diagram of the double-chamber air spring structure of the utility model;

[0020] Figure 2 It is a cross-sectional schematic diagram of the installation of the solenoid valve of the utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the solenoid valve and wiring harness assembly of the utility model.

[0022] Figure 4 It is a structural schematic diagram of the upper cover of the utility model;

[0023] Figure 5 It is a structural schematic diagram of the lower cover of the utility model;

[0024] Figure 6 It is a structural schematic diagram of the installation of the bearing seat and the upper top seat of the utility model.

[0025] The markings in the figure are: 1, upper top seat; 2, lower base; 3, upper cover; 4, lower cover; 5, solenoid valve; 6, piston; 7, bladder skin; 8, casing; 9, bearing seat; 10, bearing; 11, first dust cover; 12, second dust cover; 13, first chamber; 14, second chamber; 15, first gas channel; 16, second gas channel; 17, connecting port; 18, first groove; 19, second groove; 20, combined chamber; 21, opening; 22, pad; 23. retaining ring; 24. mounting step; 25. first sealing ring; 26. second sealing ring; 27. first threaded section; 28. second threaded section; 29. ​​first clamp; 30. second clamp; 31. first buckling ring; 32. second buckling ring; 33. corrugated raised portion; 34. corrugated depressed portion; 35. dust cover gasket; 36. support ring; 37. mounting seat; 38. claw; 39. protrusion; 40. wiring harness assembly; 41. gasket; 42. dust plug. DETAILED DESCRIPTION

[0026] The following is a further detailed explanation of the specific implementation methods of the utility model through the description of the embodiments with reference to the accompanying drawings, with the aim of helping those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the utility model and facilitating its implementation.

[0027] like Figures 1 to 6 As shown, the double-chamber air spring structure includes an upper top seat 1 and a lower base 2. The upper top seat 1 includes an upper cover 3 and a lower cover 4. The upper cover 3 is arranged on the upper end of the lower cover 4. A solenoid valve 5 is arranged between the upper cover 3 and the lower cover 4. A piston 6 is sleeved on the outside of the lower cover 4. A bladder skin 7 is connected between the lower cover 4 and the lower base 2. A protective sleeve 8 is arranged on the outside of the bladder skin 7. A bearing seat 9 is arranged on the top of the upper cover 3, and a bearing 10 is arranged between the upper cover 3 and the bearing seat 9.

[0028] like Figure 1 As shown, the double-chamber air spring structure includes a bearing seat 9, a bearing 10, an upper seat 1, a piston 6, a solenoid valve 5, a wiring harness assembly 40, a dust cover, a bladder skin 7, a casing 8 and a lower base 2; the upper seat 1 is divided into an upper cover 3 and a lower cover 4, the upper cover 3 and the lower cover 4 are fixed and sealed by welding, the bearing 10 is sleeved between the upper seat 1 and the bearing seat 9, and is used to withstand the torsion generated when the air spring is working, thereby preventing the bladder skin 7 from failing due to torsion, and the two ends of the bladder skin 7 are fastened to the tooth sections of the upper seat 1 and the lower base 2 by buckling rings respectively, and the solenoid valve 5 is arranged in the upper seat 1, and is used to control the on and off of the two chambers in the air spring.

[0029] like Figure 1As shown, the bearing 10 is a step structure, the upper end of the bearing 10 is arranged inside the bearing seat 9, and the lower end of the bearing 10 is arranged inside the upper cover 3. The upper end of the bearing 10 is clearance-matched with the bearing seat 9, and the lower end of the bearing 10 is clearance-matched with the upper cover 3. The radial direction of the bearing 10 and the upper top seat 1 is clearance-matched, and the radial direction of the bearing 10 and the bearing seat 9 is clearance-matched; the bearing 10 is assembled between the upper cover 3 and the bearing seat 9 in a clearance-matched manner, and the torsion of the air spring is borne by the bearing 10, so as to achieve the effect of protecting the air bag skin 7, thereby ensuring the normal operation of the air spring. A mounting seat 37 is provided at the top of the bearing seat 9, which is used to mount the upper end of the air spring on the vehicle body.

[0030] like Figure 1 As shown, the inner side of the bladder skin 7, the bottom end of the lower cover 4 and the upper end of the lower base 2 constitute a first chamber 13, the outer side of the bottom of the upper cover 3, the inner side of the lower cover 4 and the outer side of the solenoid valve 5 constitute a second chamber 14, a communication port 17 is provided in the middle of the bottom end of the lower cover 4, and the solenoid valve 5 is located above the communication port 17; a first gas channel 15 is provided at the bottom of the upper cover 3, and a second gas channel 16 is provided at the inner side of the lower cover 4, the first gas channel 15 and the second gas channel 16 are connected, and the bottom of the second gas channel 16 is connected to the first chamber 13. The first gas channel 15 and the second gas channel 16 are sealed and connected by welding, the other end of the first gas channel 15 is connected with a quick-connect fitting, the other end of the second gas channel 16 is connected to the first chamber 13, and the quick-connect fitting is connected to the gas path.

[0031] like Figure 4 and Figure 5 As shown, the first grooves 18 are evenly distributed at the bottom of the upper cover 3, and the second grooves 19 are evenly distributed at the top of the lower cover 4. The first grooves 18 are matched with the second grooves 19. The first grooves 18 and the second grooves 19 are connected to form a combined chamber 20. The side of the combined chamber 20 is provided with an opening 21, and the opening 21 is connected to the second chamber 14. The sizes of the first grooves 18 and the second grooves 19 are matched. After the two are welded, a combined chamber 20 can be formed. The combined chamber 20 is connected to the second chamber 14, which expands the volume of the second chamber 14 and the stiffness adjustment range of the air spring, so that the vehicle body can adapt to complex driving conditions. Among them, the setting of the first grooves 18 and the second grooves 19 does not expand the volume occupied by the original air spring, and also makes full use of the internal space of the upper top seat 1, which has a compact structure. The first grooves 18 and the second grooves 19 are arranged at equal intervals along the circumferential direction. When designing, according to the required volume of the second chamber 14, the number of combined chambers 20 connected to the second chamber 14 can be selected, so that the volume of the second chamber 14 reaches the theoretical volume.

[0032] like Figure 2As shown, the bottom of the upper cover 3 extends into the lower cover 4, the top of the solenoid valve 5 extends into the upper cover 3, the inner side of the bottom end of the lower cover 4 is provided with a mounting step 24, and the bottom end of the solenoid valve 5 is installed on the mounting step 24; a first sealing ring 25 is provided between the upper cover 3 and the side of the solenoid valve 5, a second sealing ring 26 is provided between the mounting step 24 and the bottom of the solenoid valve 5, a cushion block 22 is provided at the top of the solenoid valve 5 in the upper cover 3, and a retaining ring 23 is provided above the cushion block 22. The lower end face of the solenoid valve 5 abuts against the lower end face of the lower cover 4, the cushion block 22 is sleeved on the upper end face of the solenoid valve 5, and the retaining ring 23 is sleeved above the stopper and installed in the retaining ring groove of the upper cover 3; the solenoid valve 5 is sealed and connected to the upper cover 3 through the first sealing ring 25, and the lower end of the solenoid valve 5 is sealed and connected to the lower cover 4 through the second sealing ring 26; the solenoid valve 5 is fixed to the end face of the lower cover 4 through the cushion block 22 and the retaining ring 23, and a certain gap should be reserved in the axial direction of the solenoid valve 5 to compensate for the dimensional tolerance caused by the welding of the upper cover 3 and the lower cover 4. The two sealing rings improve the isolation and sealing effect of the first chamber 13 and the second chamber 14, so that the gas exchange path between the two can only pass through the connecting port 17, avoiding the phenomenon of gas leakage on the side of the solenoid valve 5. The middle part of the upper cover 3 is a through-hole structure, which can facilitate the installation of the wiring harness assembly 40 and the installation and removal of the cushion block 22 and the retaining ring 23, so as to achieve the purpose of simplifying the assembly steps.

[0033] like Figure 1 As shown, the two sides of the top of the bladder skin 7 are respectively fitted with the casing 8 and the piston 6, the upper end of the lower base 2 is provided with a gasket ring 41, the outer side of the gasket ring 41 is an inclined structure, and the other end of the bladder skin 7 is fitted with the outer side of the gasket ring 41; the first tooth pattern section 27 is provided on the outside of the bottom end of the lower cover 4, and the second tooth pattern section 28 is provided on the outside of the upper end of the lower base 2, and the two ends of the bladder skin 7 are respectively in contact with the first tooth pattern section 27 and the second tooth pattern section 28, and the first buckling ring 31 and the second buckling ring 32 are respectively provided on the two ends of the bladder skin 7, the first buckling ring 31 presses the top of the bladder skin 7, and the second buckling ring 32 presses the bottom of the bladder skin 7. The bladder skin 7 is fastened to the toothed section of the lower cover 4 by a first buckling ring 31. After the upper end of the bladder skin 7 is folded, one side fits against the outer side of the piston 6, and the other side fits against the inner side of the casing 8. Both ends of the bladder skin 7 are bent, which can adapt to the opening and closing of the solenoid valve 5 to control the volume change of the first chamber 13. During the movement of the air spring, the bladder skin 7 reciprocates axially along the piston 6. The working diameter and working angle of the outer contour of the piston 6 affect the stiffness of the air spring and can be adjusted according to customer needs; the other end of the bladder skin 7 is fastened to the toothed section of the lower base 2 by a second buckling ring 32, and the gasket 41 is mounted on the outer side of the second buckling ring 32. After the lower end of the bladder skin 7 is folded, it fits against the outer side of the gasket 41. The outer contour shape of the gasket 41 is designed according to the swing angle of the air spring movement and the structure of the lower base 2.

[0034] like Figure 1As shown, a support ring 36 is provided in the bladder skin 7, a corrugated protrusion 33 is provided on the casing 8, and corrugated recessed portions 34 are provided at the upper and lower ends of the corrugated protrusion 33. The support ring 36 and the corrugated protrusion 33 are at the same height, and the support ring 36 is located between the corrugated recessed portions 34. The arrangement of the corrugated protrusion 33 and the corrugated recessed portions 34 fixes the support ring 36, the bladder skin 7, and the casing 8. The spacing between the upper and lower ends of the corrugated protrusion 33 is greater than the height of the support ring 36, so that the support ring 36 can be completely wrapped; before assembly, the inner diameter of the corrugated recessed portion 34 should be greater than the outer diameter of the straight section of the casing 8, and the outer diameter of the support ring 36 should be defined according to the inner diameter size of the corrugated recessed portion 34 and the thickness of the bladder skin 7 to ensure smooth assembly of the support ring 36; the outer diameters of the two corrugated recessed portions 34 are the same, and the outer diameter size of the corrugated recessed portion 34 located at the upper end of the support ring 36 can be set to the size after buckling and pressing. If it is set to the size after buckling, then after the support ring 36 and the bladder skin 7 are mounted on the casing 8, the support ring 36 and the bladder skin 7 are limited in the axial direction.

[0035] like Figure 1 As shown, the end of the upper cover 3 is connected to the top of the casing 8 with a first dust cover 11, a first clamp 29 is provided on the outside of the top of the first dust cover 11, a dust cover gasket 35 is provided between the bottom of the first dust cover 11 and the casing 8, and a second clamp 30 is provided on the outside of the bottom of the first dust cover 11. The first clamp 29 and the second clamp 30 respectively press the two ends of the first dust cover 11; a second dust cover 12 is provided between the casing 8 and the lower base 2, and the two ends of the second dust cover 12 are respectively clamped with the bottom of the casing 8 and the end of the lower base 2. The dust cover of the air spring is divided into a first dust cover 11 and a second dust cover 12, which has a reliable dustproof effect and can fully isolate the influence of external sand and stones on the components inside the air spring. The first dust cover 11 and the second dust cover 12 are both corrugated structures, which can adapt to the movement of the bladder skin 7. The dust cover gasket 35 is used to ventilate the dust cover and isolate external sand and stones. Both ends of the first dust cover 11 are fixed by clamps. When installing the first dust cover 11, the dust cover gasket 35 is preferably inserted into the installation groove of the outer wall of the casing 8, and the first dust cover 11 is inserted into the installation groove of the outer wall of the dust cover gasket 35. The end of the upper cover 3 is provided with a mounting groove that matches the top of the first dust cover 11, and then fixed by two clamps; the mounting assembly at the lower end of the first dust cover 11 is installed from the inside to the outside according to Next is the casing 8, the dust cover gasket 35, the second dust cover 12, and the clamp; the second dust cover 12 is fixed to the casing 8 and the lower base 2 by clamping, and the radial direction of the second dust cover 12 and the casing 8 and the lower base 2 is interference fit. In order to ensure the radial contact width of the second dust cover 12 at the clamping part, the wall thickness of the second dust cover 12 at the clamping parts at both ends is increased, and a corrugated part is provided between the two ends of the second dust cover 12. The thickness of the two ends of the second dust cover 12 is greater than the thickness of the corrugated part, which can improve the clamping strength.

[0036] The upper diameter of the first dust cover 11 is smaller than the lower diameter of the first dust cover 11; during the assembly process, the first dust cover 11 can be easily installed from top to bottom. The first dust cover 11 and the second dust cover 12 can be installed by clamping or clamping; if the first dust cover 11 and the casing 8 are fixed by clamping, a labyrinth vent is required at the clamping structure of the first dust cover 11. The shape of the vent cannot be a straight-through type, and it needs to be designed as a bending type. The specific structure is not limited; if the first dust cover 11 and the upper seat 1 are fixed by clamping, the width of the clamping groove of the first dust cover 11 needs to be greater than or equal to the width of the clamping part of the upper seat 1, and the diameter of the clamping groove of the first dust cover 11 should be less than or equal to the diameter of the clamping part of the upper seat 1. The size design should be defined in combination with the actual assembly to ensure that after the first dust cover 11 is clamped, the clamping section will not be warped or deformed.

[0037] like Figure 6 As shown, the upper cover 3 is provided with a protrusion 39 on the outside, and the bearing seat 9 is provided with a claw 38 at the bottom. The claw 38 is arranged at equal intervals along the circumferential direction, and the claw 38 cooperates with the protrusion 39. In order to prevent the bearing 10 from detaching during transportation and assembly, a circle of protrusions 39 is provided on the outside of the upper cover 3, and the clamping is achieved through multiple claws 38, which is convenient for installation and firmly connected. The upper cover 3 and the bearing seat 9 are installed by clamping. After the air spring is assembled to the whole vehicle, the axial height of the bearing 10 will be compressed due to pressure. Therefore, the clamping part of the upper top seat 1 and the bearing seat 9 should maintain a certain gap in the axial direction to avoid interference between the upper top seat 1 and the bearing seat 9 after the bearing 10 is compressed.

[0038] like Figure 3 As shown, the top of the solenoid valve 5 is connected to a wiring harness assembly 40, which extends from the upper top seat 1, and a dust plug 42 is provided on the wiring harness assembly 40. One end of the wiring harness assembly 40 is plugged into the top of the solenoid valve 5, and the other end is plugged into the wiring harness of the whole vehicle. The wiring harness assembly 40 connects the solenoid valve 5 with the whole vehicle circuit, supplies power to the solenoid valve 5 and transmits signals. The wiring harness assembly 40 is located below the bearing 10, and a dust plug 42 is installed on the wiring harness assembly 40. The dust plug 42 is interference-fitted with the upper top seat 1, so that the wiring harness assembly 40 is fixed on the upper top seat 1.

[0039] The working principle is as follows: the inner cavity of the air spring is composed of a first chamber 13 and a second chamber 14. The air pressure of the gas in the first chamber 13 is adjusted through the gas channel to make the bladder skin 7 reciprocate in the axial direction along the piston 6; the first chamber 13 and the second chamber 14 are connected under the opening and closing action of the solenoid valve 5 to expand the volume of the inner cavity of the air spring. At the same time, under the connection action of the combined chamber 20 formed by the first groove 18 and the second groove 19 and the second chamber 14, the volume of the inner cavity of the air spring is further expanded, thereby expanding the adjustment range of the air spring stiffness to meet the air spring stiffness required by the car in different driving modes, so that the car can adapt to different driving conditions and ensure the riding comfort of passengers.

[0040] The double-chamber air spring structure divides the inner cavity of the air spring into two chambers. The connection and disconnection of the first chamber 13 and the second chamber 14 are realized by controlling the opening and closing of the solenoid valve 5, so that the stiffness of the air spring can be adjusted, and the problem of the single-chamber air spring stiffness being unadjustable is solved. A combined chamber 20 connected to the second chamber 14 is also designed at the connection between the upper cover 3 and the lower cover 4, ensuring that the second chamber 14 can reach the required design theoretical volume, which can adapt to different driving modes of the car and improve the comfort of passengers. A bearing 10 structure is added to the upper top seat 1, and the torsion generated during the working process of the air spring is borne by the bearing 10, which solves the problem of torsion failure of the air spring bladder skin when the shock absorber and the air spring are split structures. The double-chamber air spring structure has a reasonable structural design, reliable connection between the components, stable and firm component installation, convenient assembly, simple process, compact structure, and can reduce application costs.

[0041] The above is an exemplary description of the utility model in conjunction with the accompanying drawings. Obviously, the specific implementation of the utility model is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the method concept and technical solution of the utility model; or the above concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A dual-chamber air spring structure, characterized in that: The invention comprises an upper top seat (1) and a lower base (2), wherein the upper top seat (1) comprises an upper cover (3) and a lower cover (4), wherein the upper cover (3) is arranged at the upper end of the lower cover (4), an electromagnetic valve (5) is arranged between the upper cover (3) and the lower cover (4), a piston (6) is sleeved on the outside of the lower cover (4), a bladder (7) is connected between the lower cover (4) and the lower base (2), a protective sleeve (8) is arranged on the outside of the bladder (7), a bearing seat (9) is arranged on the top of the upper cover (3), and a bearing (10) is arranged between the upper cover (3) and the bearing seat (9).

2. The dual-chamber air spring structure according to claim 1, characterized in that: The bearing (10) is a step structure. The upper end of the bearing (10) is arranged on the inner side of the bearing seat (9), and the lower end of the bearing (10) is arranged on the inner side of the upper cover (3). The upper end of the bearing (10) is clearance-matched with the bearing seat (9), and the lower end of the bearing (10) is clearance-matched with the upper cover (3).

3. The dual-chamber air spring structure according to claim 2, characterized in that: The inner side of the bladder skin (7), the bottom end of the lower cover (4) and the upper end of the lower base (2) form a first chamber (13); the outer side of the bottom of the upper cover (3), the inner side of the lower cover (4) and the outer side of the solenoid valve (5) form a second chamber (14); a connecting port (17) is provided in the middle of the bottom end of the lower cover (4); the solenoid valve (5) is located above the connecting port (17); a first gas channel (15) is provided at the bottom of the upper cover (3), and a second gas channel (16) is provided on the inner side of the lower cover (4); the first gas channel (15) and the second gas channel (16) are connected, and the bottom of the second gas channel (16) is connected to the first chamber (13).

4. The dual-chamber air spring structure according to claim 3, characterized in that: The bottom end of the upper cover (3) is evenly distributed with first grooves (18), and the top end of the lower cover (4) is evenly distributed with second grooves (19), the first grooves (18) and the second grooves (19) are matched, the first grooves (18) and the second grooves (19) are connected to form a combined chamber (20), and the side of the combined chamber (20) is provided with an opening (21), and the opening (21) is connected with the second chamber (14).

5. The dual-chamber air spring structure according to any one of claims 1 to 4, characterized in that: The bottom of the upper cover (3) extends into the lower cover (4), the top of the solenoid valve (5) extends into the upper cover (3), the inner side of the bottom end of the lower cover (4) is provided with a mounting step (24), and the bottom end of the solenoid valve (5) is mounted on the mounting step (24); a first sealing ring (25) is provided between the upper cover (3) and the side of the solenoid valve (5), a second sealing ring (26) is provided between the mounting step (24) and the bottom of the solenoid valve (5), a cushion block (22) is provided in the upper cover (3) at the top of the solenoid valve (5), and a retaining ring (23) is provided above the cushion block (22).

6. The dual-chamber air spring structure according to claim 5, characterized in that: The top two sides of the bladder skin (7) are respectively fitted with the casing (8) and the piston (6); the upper end of the lower base (2) is provided with a gasket ring (41); the outer side of the gasket ring (41) is an inclined structure; the other end of the bladder skin (7) is fitted with the outer side of the gasket ring (41); the bottom end of the lower cover (4) is provided with a first tooth pattern section (27); the upper end of the lower base (2) is provided with a second tooth pattern section (28); the two ends of the bladder skin (7) are respectively in contact with the first tooth pattern section (27) and the second tooth pattern section (28); the two ends of the bladder skin (7) are respectively provided with a first buckling ring (31) and a second buckling ring (32); the first buckling ring (31) presses the top end of the bladder skin (7); the second buckling ring (32) presses the bottom end of the bladder skin (7).

7. The dual-chamber air spring structure according to claim 6, characterized in that: A support ring (36) is provided inside the bladder skin (7), a corrugated raised portion (33) is provided on the casing (8), and corrugated recessed portions (34) are provided at the upper and lower ends of the corrugated raised portion (33). The support ring (36) and the corrugated raised portion (33) are at the same height, and the support ring (36) is located between the corrugated recessed portions (34).

8. The dual-chamber air spring structure according to claim 6, characterized in that: A first dust cover (11) is connected to the end of the upper cover (3) and the top of the protective tube (8); a first clamp (29) is provided on the outside of the top of the first dust cover (11); a dust cover gasket (35) is provided between the bottom of the first dust cover (11) and the protective tube (8); a second clamp (30) is provided on the outside of the bottom of the first dust cover (11); the first clamp (29) and the second clamp (30) respectively press the two ends of the first dust cover (11); a second dust cover (12) is provided between the protective tube (8) and the lower base (2); the two ends of the second dust cover (12) are respectively clamped with the bottom of the protective tube (8) and the end of the lower base (2).

9. The dual-chamber air spring structure according to claim 2, characterized in that: The upper cover (3) is provided with a protrusion (39) on the outside, and the bottom end of the bearing seat (9) is provided with a claw (38), the claws (38) are arranged at equal intervals along the circumferential direction, and the claws (38) cooperate with the protrusion (39).

10. The dual-chamber air spring structure according to claim 5, characterized in that: The top end of the solenoid valve (5) is connected to a wiring harness assembly (40), the wiring harness assembly (40) extends from the upper top seat (1), and a dust plug (42) is provided on the wiring harness assembly (40).

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